Mass number of an atom represents the number of
Correct answer: C. Neutron plus proton:
- A. Proton
- B. Neutron:
- C. Neutron plus proton:
- D. Proton plus electron:
Explanation
The mass number is the sum of protons and neutrons in the nucleus. This is the definition of mass number.This is the correct answer.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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